event timeline

app/widgets.py

@@ -0,0 +1,21 @@
+import logging
+import json
+
+from django.forms import widgets
+
+logger = logging.getLogger(__name__)
+
+class PrettyJSONWidget(widgets.Textarea):
+
+    def format_value(self, value):
+        try:
+            value = json.dumps(json.loads(value), indent=2, sort_keys=True, ensure_ascii=False)
+            # these lines will try to adjust size of TextArea to fit to content
+            row_lengths = [len(r) for r in value.split('\n')]
+            self.attrs['rows'] = min(max(len(row_lengths) + 2, 10), 30)
+            self.attrs['cols'] = min(max(max(row_lengths) + 2, 40), 120)
+            return value
+        except Exception as e:
+            logger.warning("Error while formatting JSON: {}".format(e))
+            return super(PrettyJSONWidget, self).format_value(value)
+